Anterior dural ectasia mimicking a lytic lesion in the posterior vertebral body in ankylosing spondylitis

Case report

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Anterior dural ectasia is an extremely rare finding in ankylosing spondylitis (AS). The authors describe a unique case of AS in which the patient presented with cauda equina syndrome as well as an unusual imaging finding of erosion of the posterior aspect of the L-1 (predominantly) and L-2 vertebral bodies due to anterior dural ectasia. Symptomatic patients with long-standing AS should be monitored for the presence of dural ectasia, which can be anterior in location, as is demonstrated in the present case.

Abbreviations used in this paper: AS = ankylosing spondylitis; CES = cauda equina syndrome; LPS = lumboperitoneal shunting.
Article Information

Contributor Notes

Address correspondence to: Hima Shriniwas Pendharkar, D.M.R.D., D.N.B., D.M., Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India. email: himasp1@yahoo.co.in.Please include this information when citing this paper: published online September 16, 2011; DOI: 10.3171/2011.8.SPINE1142.
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